This square concealed thermostatic mixer valve shower set is a perfect addition to any bathroom. The thermostatic mixer valve gives you complete temperature control with a built-in anti-scalding device, so you'll never have to worry about a drop in temperature again. All our valves have isolators and non-return valves meaning that it can be accessed from the front so, if a problem occurs it can be easily resolved without removing the valve from the wall. Most competitors' valves do not have this feature.